LECTURE 7 (2024)

How many degrees are there in half a circle?

• 360^o
• 2pi
• 180^o
• pi

1 revolution:

The rate of change of angular displacement is called:

• Angular displacement

• Angular velocity

• Angular acceleration

• Torque

Centripetal force performs

• Maximum work

• Minimum work

• Negative work

• No work

When an object experiences uniform circular motion, the direction of the net force is

• In the same direction as the motion of the object.

• In the opposite direction of the motion of the object.

• Is directed toward the center of the circular path

• Is directed away from the center of the circular path.

The string makes an angle to the vertical and the tension of the string is T. Which of the following represent the centripetal force in the horizontal circular motion

Is it possible for an object moving with constant speed to accelerate?

• No. If the speed is constant then the acceleration equal to zero

• No. An object can accelerate only if there is net force acting on it

• Yes. Although the speed is constant, the direction of the velocity can be changing

• Yes. If the object is moving it can experience acceleration

The _______________________ supplies the centripetal force requirement for the car to move in a horizontal circle. Without it, the car would turn its wheels but would not move in a circle (as is the case on an icy surface).

• friction force

• centrifugal force

• normal force

• applied force

Based on the figure below, which position of the object have centripetal acceleration ?

• A

• C

• B AND D

• A, B, C AND D

If the radius of curvature of a corner is r, the maximum speed of a car rounding the corner without sliding is directly proportional to: